我在尝试使用boost :: interprocess：map时遇到编译错误，我不明白错误。
声明地图及其分配器
using namespace boost::interprocess;
struct Order {
uint64_t id = 0;
uint64_t val = 0;
};
typedef std::pair<const uint64_t, Order> ValueType;
typedef allocator<ValueType,
managed_shared_memory::segment_manager> OrderMapAllocator;
typedef map<const uint64_t,
Order,
std::less<const uint64_t>,
OrderMapAllocator> OrderMap;
示例用法，编译器错误指出第120行，它是下面函数的第一行：
OrderMap * _orders;
void addOrder(Order order) {
if(_orders->find(order.id) != _orders->end()){
/* stuff */
} else {
(*_orders)[order.id] = order;
}
}
注意，我之前使用std :: map成功运行了代码，键是非const而不是const。我将密钥切换到const uint64_t，因为boost中的类型断言失败了。
获取下面无法解释的编译器错误
为简洁起见，第一个结束：
boost::container::map<Key, T, Compare, Allocator, Options>::nonconst_value_type = std::pair<const long unsigned int, Order>]’ cannot be overloaded
std::pair<iterator,bool> insert(const nonconst_value_type& x)
-
In file included from include/boost/interprocess/containers/map.hpp:23:0,
from src/app/SharedOrderBook.h:7,
from src/app/futures_feed.cpp:20:
include/boost/container/map.hpp: In instantiation of ‘class boost::container::map<const long unsigned int, Order, std::less<const long unsigned int>, boost::interprocess::allocator<std::pair<const long unsigned int, Order>, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family>, boost::interprocess::iset_index> > >’:
src/app/SharedOrderBook.h:120:19: required from here
include/boost/container/map.hpp:541:29: error: ‘std::pair<typename boost::container::container_detail::tree<Key, std::pair<const Key, T>, boost::container::container_detail::select1st<std::pair<const Key, T> >, Compare, Allocator, MapOptions>::iterator, bool> boost::container::map<Key, T, Compare, Allocator, Options>::insert(const nonconst_value_type&) [with Key = const long unsigned int; T = Order; Compare = std::less<const long unsigned int>; Allocator = boost::interprocess::allocator<std::pair<const long unsigned int, Order>, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family>, boost::interprocess::iset_index> >; MapOptions = boost::container::tree_opt<(boost::container::tree_type_enum)0u, true>; typename boost::container::container_detail::tree<Key, std::pair<const Key, T>, boost::container::container_detail::select1st<std::pair<const Key, T> >, Compare, Allocator, MapOptions>::iterator = boost::container::container_detail::iterator_from_iiterator<boost::intrusive::tree_iterator<boost::intrusive::bhtraits<boost::container::container_detail::tree_node<std::pair<const long unsigned int, Order>, boost::interprocess::offset_ptr<void>, (boost::container::tree_type_enum)0u, true>, boost::intrusive::rbtree_node_traits<boost::interprocess::offset_ptr<void>, true>, (boost::intrusive::link_mode_type)0u, boost::intrusive::dft_tag, 3u>, false>, false>; boost::container::map<Key, T, Compare, Allocator, Options>::nonconst_value_type = std::pair<const long unsigned int, Order>]’ cannot be overloaded
std::pair<iterator,bool> insert(const nonconst_value_type& x)
^~~~~~
include/boost/container/map.hpp:530:29: error: with ‘std::pair<typename boost::container::container_detail::tree<Key, std::pair<const Key, T>, boost::container::container_detail::select1st<std::pair<const Key, T> >, Compare, Allocator, MapOptions>::iterator, bool> boost::container::map<Key, T, Compare, Allocator, Options>::insert(const value_type&) [with Key = const long unsigned int; T = Order; Compare = std::less<const long unsigned int>; Allocator = boost::interprocess::allocator<std::pair<const long unsigned int, Order>, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family>, boost::interprocess::iset_index> >; MapOptions = boost::container::tree_opt<(boost::container::tree_type_enum)0u, true>; typename boost::container::container_detail::tree<Key, std::pair<const Key, T>, boost::container::container_detail::select1st<std::pair<const Key, T> >, Compare, Allocator, MapOptions>::iterator = boost::container::container_detail::iterator_from_iiterator<boost::intrusive::tree_iterator<boost::intrusive::bhtraits<boost::container::container_detail::tree_node<std::pair<const long unsigned int, Order>, boost::interprocess::offset_ptr<void>, (boost::container::tree_type_enum)0u, true>, boost::intrusive::rbtree_node_traits<boost::interprocess::offset_ptr<void>, true>, (boost::intrusive::link_mode_type)0u, boost::intrusive::dft_tag, 3u>, false>, false>; boost::container::map<Key, T, Compare, Allocator, Options>::value_type = std::pair<const long unsigned int, Order>]’
std::pair<iterator,bool> insert(const value_type& x)
^~~~~~
include/boost/container/map.hpp:574:29: error: ‘std::pair<typename boost::container::container_detail::tree<Key, std::pair<const Key, T>, boost::container::container_detail::select1st<std::pair<const Key, T> >, Compare, Allocator, MapOptions>::iterator, bool> boost::container::map<Key, T, Compare, Allocator, Options>::insert(boost::container::map<Key, T, Compare, Allocator, Options>::value_type&&) [with Key = const long unsigned int; T = Order; Compare = std::less<const long unsigned int>; Allocator = boost::interprocess::allocator<std::pair<const long unsigned int, Order>, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family>, boost::interprocess::iset_index> >; MapOptions = boost::container::tree_opt<(boost::container::tree_type_enum)0u, true>; typename boost::container::container_detail::tree<Key, std::pair<const Key, T>, boost::container::container_detail::select1st<std::pair<const Key, T> >, Compare, Allocator, MapOptions>::iterator = boost::container::container_detail::iterator_from_iiterator<boost::intrusive::tree_iterator<boost::intrusive::bhtraits<boost::container::container_detail::tree_node<std::pair<const long unsigned int, Order>, boost::interprocess::offset_ptr<void>, (boost::container::tree_type_enum)0u, true>, boost::intrusive::rbtree_node_traits<boost::interprocess::offset_ptr<void>, true>, (boost::intrusive::link_mode_type)0u, boost::intrusive::dft_tag, 3u>, false>, false>; boost::container::map<Key, T, Compare, Allocator, Options>::value_type = std::pair<const long unsigned int, Order>]’ cannot be overloaded
std::pair<iterator,bool> insert(BOOST_RV_REF(value_type) x)
^~~~~~
include/boost/container/map.hpp:552:29: error: with ‘std::pair<typename boost::container::container_detail::tree<Key, std::pair<const Key, T>, boost::container::container_detail::select1st<std::pair<const Key, T> >, Compare, Allocator, MapOptions>::iterator, bool> boost::container::map<Key, T, Compare, Allocator, Options>::insert(boost::container::map<Key, T, Compare, Allocator, Options>::nonconst_value_type&&) [with Key = const long unsigned int; T = Order; Compare = std::less<const long unsigned int>; Allocator = boost::interprocess::allocator<std::pair<const long unsigned int, Order>, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family>, boost::interprocess::iset_index> >; MapOptions = boost::container::tree_opt<(boost::container::tree_type_enum)0u, true>; typename boost::container::container_detail::tree<Key, std::pair<const Key, T>, boost::container::container_detail::select1st<std::pair<const Key, T> >, Compare, Allocator, MapOptions>::iterator = boost::container::container_detail::iterator_from_iiterator<boost::intrusive::tree_iterator<boost::intrusive::bhtraits<boost::container::container_detail::tree_node<std::pair<const long unsigned int, Order>, boost::interprocess::offset_ptr<void>, (boost::container::tree_type_enum)0u, true>, boost::intrusive::rbtree_node_traits<boost::interprocess::offset_ptr<void>, true>, (boost::intrusive::link_mode_type)0u, boost::intrusive::dft_tag, 3u>, false>, false>; boost::container::map<Key, T, Compare, Allocator, Options>::nonconst_value_type = std::pair<const long unsigned int, Order>]’
std::pair<iterator,bool> insert(BOOST_RV_REF(nonconst_value_type) x)
^~~~~~
include/boost/container/map.hpp:619:13: error: ‘boost::container::map<Key, T, Compare, Allocator, Options>::iterator boost::container::map<Key, T, Compare, Allocator, Options>::insert(boost::container::map<Key, T, Compare, Allocator, Options>::const_iterator, const nonconst_value_type&) [with Key = const long unsigned int; T = Order; Compare = std::less<const long unsigned int>; Allocator = boost::interprocess::allocator<std::pair<const long unsigned int, Order>, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family>, boost::interprocess::iset_index> >; MapOptions = boost::container::tree_opt<(boost::container::tree_type_enum)0u, true>; boost::container::map<Key, T, Compare, Allocator, Options>::iterator = boost::container::container_detail::iterator_from_iiterator<boost::intrusive::tree_iterator<boost::intrusive::bhtraits<boost::container::container_detail::tree_node<std::pair<const long unsigned int, Order>, boost::interprocess::offset_ptr<void>, (boost::container::tree_type_enum)0u, true>, boost::intrusive::rbtree_node_traits<boost::interprocess::offset_ptr<void>, true>, (boost::intrusive::link_mode_type)0u, boost::intrusive::dft_tag, 3u>, false>, false>; boost::container::map<Key, T, Compare, Allocator, Options>::const_iterator = boost::container::container_detail::iterator_from_iiterator<boost::intrusive::tree_iterator<boost::intrusive::bhtraits<boost::container::container_detail::tree_node<std::pair<const long unsigned int, Order>, boost::interprocess::offset_ptr<void>, (boost::container::tree_type_enum)0u, true>, boost::intrusive::rbtree_node_traits<boost::interprocess::offset_ptr<void>, true>, (boost::intrusive::link_mode_type)0u, boost::intrusive::dft_tag, 3u>, false>, true>; boost::container::map<Key, T, Compare, Allocator, Options>::nonconst_value_type = std::pair<const long unsigned int, Order>]’ cannot be overloaded
iterator insert(const_iterator p, const nonconst_value_type& x)
^~~~~~
include/boost/container/map.hpp:586:13: error: with ‘boost::container::map<Key, T, Compare, Allocator, Options>::iterator boost::container::map<Key, T, Compare, Allocator, Options>::insert(boost::container::map<Key, T, Compare, Allocator, Options>::const_iterator, const value_type&) [with Key = const long unsigned int; T = Order; Compare = std::less<const long unsigned int>; Allocator = boost::interprocess::allocator<std::pair<const long unsigned int, Order>, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family>, boost::interprocess::iset_index> >; MapOptions = boost::container::tree_opt<(boost::container::tree_type_enum)0u, true>; boost::container::map<Key, T, Compare, Allocator, Options>::iterator = boost::container::container_detail::iterator_from_iiterator<boost::intrusive::tree_iterator<boost::intrusive::bhtraits<boost::container::container_detail::tree_node<std::pair<const long unsigned int, Order>, boost::interprocess::offset_ptr<void>, (boost::container::tree_type_enum)0u, true>, boost::intrusive::rbtree_node_traits<boost::interprocess::offset_ptr<void>, true>, (boost::intrusive::link_mode_type)0u, boost::intrusive::dft_tag, 3u>, false>, false>; boost::container::map<Key, T, Compare, Allocator, Options>::const_iterator = boost::container::container_detail::iterator_from_iiterator<boost::intrusive::tree_iterator<boost::intrusive::bhtraits<boost::container::container_detail::tree_node<std::pair<const long unsigned int, Order>, boost::interprocess::offset_ptr<void>, (boost::container::tree_type_enum)0u, true>, boost::intrusive::rbtree_node_traits<boost::interprocess::offset_ptr<void>, true>, (boost::intrusive::link_mode_type)0u, boost::intrusive::dft_tag, 3u>, false>, true>; boost::container::map<Key, T, Compare, Allocator, Options>::value_type = std::pair<const long unsigned int, Order>]’
iterator insert(const_iterator p, const value_type& x)
^~~~~~
include/boost/container/map.hpp:628:13: error: ‘boost::container::map<Key, T, Compare, Allocator, Options>::iterator boost::container::map<Key, T, Compare, Allocator, Options>::insert(boost::container::map<Key, T, Compare, Allocator, Options>::const_iterator, boost::container::map<Key, T, Compare, Allocator, Options>::value_type&&) [with Key = const long unsigned int; T = Order; Compare = std::less<const long unsigned int>; Allocator = boost::interprocess::allocator<std::pair<const long unsigned int, Order>, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family>, boost::interprocess::iset_index> >; MapOptions = boost::container::tree_opt<(boost::container::tree_type_enum)0u, true>; boost::container::map<Key, T, Compare, Allocator, Options>::iterator = boost::container::container_detail::iterator_from_iiterator<boost::intrusive::tree_iterator<boost::intrusive::bhtraits<boost::container::container_detail::tree_node<std::pair<const long unsigned int, Order>, boost::interprocess::offset_ptr<void>, (boost::container::tree_type_enum)0u, true>, boost::intrusive::rbtree_node_traits<boost::interprocess::offset_ptr<void>, true>, (boost::intrusive::link_mode_type)0u, boost::intrusive::dft_tag, 3u>, false>, false>; boost::container::map<Key, T, Compare, Allocator, Options>::const_iterator = boost::container::container_detail::iterator_from_iiterator<boost::intrusive::tree_iterator<boost::intrusive::bhtraits<boost::container::container_detail::tree_node<std::pair<const long unsigned int, Order>, boost::interprocess::offset_ptr<void>, (boost::container::tree_type_enum)0u, true>, boost::intrusive::rbtree_node_traits<boost::interprocess::offset_ptr<void>, true>, (boost::intrusive::link_mode_type)0u, boost::intrusive::dft_tag, 3u>, false>, true>; boost::container::map<Key, T, Compare, Allocator, Options>::value_type = std::pair<const long unsigned int, Order>]’ cannot be overloaded
iterator insert(const_iterator p, BOOST_RV_REF(value_type) x)
^~~~~~
include/boost/container/map.hpp:598:13: error: with ‘boost::container::map<Key, T, Compare, Allocator, Options>::iterator boost::container::map<Key, T, Compare, Allocator, Options>::insert(boost::container::map<Key, T, Compare, Allocator, Options>::const_iterator, boost::container::map<Key, T, Compare, Allocator, Options>::nonconst_value_type&&) [with Key = const long unsigned int; T = Order; Compare = std::less<const long unsigned int>; Allocator = boost::interprocess::allocator<std::pair<const long unsigned int, Order>, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family>, boost::interprocess::iset_index> >; MapOptions = boost::container::tree_opt<(boost::container::tree_type_enum)0u, true>; boost::container::map<Key, T, Compare, Allocator, Options>::iterator = boost::container::container_detail::iterator_from_iiterator<boost::intrusive::tree_iterator<boost::intrusive::bhtraits<boost::container::container_detail::tree_node<std::pair<const long unsigned int, Order>, boost::interprocess::offset_ptr<void>, (boost::container::tree_type_enum)0u, true>, boost::intrusive::rbtree_node_traits<boost::interprocess::offset_ptr<void>, true>, (boost::intrusive::link_mode_type)0u, boost::intrusive::dft_tag, 3u>, false>, false>; boost::container::map<Key, T, Compare, Allocator, Options>::const_iterator = boost::container::container_detail::iterator_from_iiterator<boost::intrusive::tree_iterator<boost::intrusive::bhtraits<boost::container::container_detail::tree_node<std::pair<const long unsigned int, Order>, boost::interprocess::offset_ptr<void>, (boost::container::tree_type_enum)0u, true>, boost::intrusive::rbtree_node_traits<boost::interprocess::offset_ptr<void>, true>, (boost::intrusive::link_mode_type)0u, boost::intrusive::dft_tag, 3u>, false>, true>; boost::container::map<Key, T, Compare, Allocator, Options>::nonconst_value_type = std::pair<const long unsigned int, Order>]’
iterator insert(const_iterator p, BOOST_RV_REF(nonconst_value_type) x)
^~~~~~
In file included from include/boost/interprocess/segment_manager.hpp:33:0,
from include/boost/interprocess/detail/managed_memory_impl.hpp:30,
from include/boost/interprocess/managed_shared_memory.hpp:25,
from src/app/SharedOrderBook.h:6,
from src/app/futures_feed.cpp:20:
include/boost/interprocess/detail/named_proxy.hpp: In instantiation of ‘void boost::interprocess::ipcdetail::CtorArgN<T, is_iterator, Args>::construct(void*, boost::interprocess::ipcdetail::false_, const boost::container::container_detail::index_tuple<IdxPack ...>&) [with int ...IdxPack = {0, 1}; T = boost::container::map<const long unsigned int, Order, std::less<const long unsigned int>, boost::interprocess::allocator<std::pair<const long unsigned int, Order>, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family>, boost::interprocess::iset_index> > >; bool is_iterator = false; Args = {std::less<long unsigned int>, boost::interprocess::allocator<std::pair<const long unsigned int, Order>, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void, long int, long unsigned int, 0ul>, 0ul>, boost::interprocess::iset_index> >&}; boost::interprocess::ipcdetail::false_ = boost::interprocess::ipcdetail::bool_<false>]’:
include/boost/interprocess/detail/named_proxy.hpp:71:10: required from ‘void boost::interprocess::ipcdetail::CtorArgN<T, is_iterator, Args>::construct_n(void*, std::size_t, std::size_t&) [with T = boost::container::map<const long unsigned int, Order, std::less<const long unsigned int>, boost::interprocess::allocator<std::pair<const long unsigned int, Order>, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family>, boost::interprocess::iset_index> > >; bool is_iterator = false; Args = {std::less<long unsigned int>, boost::interprocess::allocator<std::pair<const long unsigned int, Order>, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void, long int, long unsigned int, 0ul>, 0ul>, boost::interprocess::iset_index> >&}; std::size_t = long unsigned int]’
src/app/futures_feed.cpp:170:1: required from here
include/boost/interprocess/detail/named_proxy.hpp:83:7: error: no matching function for call to ‘boost::container::map<const long unsigned int, Order, std::less<const long unsigned int>, boost::interprocess::allocator<std::pair<const long unsigned int, Order>, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family>, boost::interprocess::iset_index> > >::map(std::less<long unsigned int>, boost::interprocess::allocator<std::pair<const long unsigned int, Order>, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family>, boost::interprocess::iset_index> >&)’
{ ::new((void*)mem, boost_container_new_t())T(boost::forward<Args>(get<IdxPack>(args_))...); }
如果我摆脱了const uint64_t并使用uint64_t作为密钥，我会收到以下错误：
include/boost/container/map.hpp:150:7: error: static assertion failed: (container_detail::is_same<std::pair<const Key, T>, typename Allocator::value_type>::value)
BOOST_STATIC_ASSERT((container_detail::is_same<std::pair<const Key, T>, typename Allocator::value_type>::value));